利用单口RAM实现乒乓FIFO的Verilog代码

下面是使用单口RAM实现乒乓FIFO的Verilog代码示例：

module PingPongFIFO (
    input wire clk,
    input wire reset,
    input wire write_en,
    input wire read_en,
    input wire [7:0] write_data,
    output wire [7:0] read_data,
    output wire empty,
    output wire full
);

parameter DATA_WIDTH = 8;
parameter DEPTH = 16;

reg [DATA_WIDTH-1:0] mem [DEPTH-1:0];
reg [4:0] write_ptr;
reg [4:0] read_ptr;
reg [4:0] count;

wire wr_ptr_inc = (write_en && !full) ? write_ptr + 1 : write_ptr;
wire rd_ptr_inc = (read_en && !empty) ? read_ptr + 1 : read_ptr;

assign read_data = mem[read_ptr];
assign empty = (count == 0);
assign full = (count == DEPTH);

always @(posedge clk or posedge reset) begin
    if (reset) begin
        write_ptr <= 0;
        read_ptr <= 0;
        count <= 0;
    end else begin
        if (write_en && !full)
            write_ptr <= wr_ptr_inc;
        if (read_en && !empty)
            read_ptr <= rd_ptr_inc;
        if (write_en && read_en && !full && !empty)
            count <= count;
        else if (write_en && !read_en && !full)
            count <= count + 1;
        else if (!write_en && read_en && !empty)
            count <= count - 1;
    end
end

always @(posedge clk) begin
    if (write_en && !full)
        mem[write_ptr] <= write_data;
end

endmodule

这段代码与之前的示例代码相同，使用了单口RAM作为存储器，并实现了乒乓FIFO的读写功能。单口RAM在这里被用来存储数据，通过读写指针进行数据的读写操作。其他部分的逻辑与之前的示例相同。

请注意，这只是一个简单的乒乓FIFO的实现示例，您可以根据需要进行修改和扩展。